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Find z-scores that divide area under standard normal curve

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Reference no: EM131112139

Assume that the variable under consideration has a density curve. The area under the density curve that lies between 20 and 26 is 0.399. What percentage of all possible observations of the variable are either less than 20 or greater than 26?

Determine the two z-scores that divide the area under the standard normal curve into a middle 0.48 area and two outside 0.26 areas.

Reference no: EM131112139

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